Morphology and mechanical properties of polypropylene/maleated styrene-butadiene-styrene triblock copolymer blends

2002 ◽  
Vol 86 (2) ◽  
pp. 359-365 ◽  
Author(s):  
Helena Maria Wilhelm ◽  
Maria Isabel Felisberti
Keyword(s):  
Mechanical Properties ◽  
Triblock Copolymer ◽  
Copolymer Blends ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Morphology And Mechanical Properties ◽  
Butadiene Styrene

Preparation and Properties of Styrene Butadiene Styrene/Nano Calcium Carbonate Thermoplastics Elastomer Composite Foams: Morphology and Mechanical Properties

2017 ◽  
Vol 36 (5) ◽  
pp. 251-268 ◽  
Author(s):  
Maryam Vahidi ◽  
Hamed Azizi
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Carbonate Content ◽  
Cell Nucleation ◽  
Nanocomposite Foams ◽  
Composite Foams ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Morphology And Mechanical Properties ◽  
Butadiene Styrene

In this study, nanocomposite foams based on styrene-butadiene-styrene (SBS) copolymer and nanosized calcium carbonate (CaCO3) were prepared using chemical blowing agent (modified Azodicarbonamide) by compression molding at (230°C) temperature and (30MPa) pressure. The effect of nano CaCO3 concentration on cell nucleation rate, foam density, morphology and mechanical properties were studied for all samples. It was found that foam morphology and strength affected by nanofiller addition and its concentration. The results showed that SBS nanocomposite foam with 5 phr of CaCO3 nanoparticles have more cell density and smaller size cells compared with another samples. mechanical properties in compressive mode for foams were improved by increasing nano calcium carbonate content.

Compatibility and Storage Stability of Asphalt Binder Modified by Styrene-Butadiene-Styrene (SBS) Graft Copolymer

2021 ◽  
Vol 1036 ◽  
pp. 459-470
Author(s):  
Hong Gang Zhang ◽  
Qiang Huai Zhang ◽  
Xue Ting Wang ◽  
Hua Tan ◽  
Li Ning Gao ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Storage Stability ◽  
Asphalt Binder ◽  
Solubility Parameters ◽  
Suitable Alternative ◽  
Modified Asphalt ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
Butadiene Styrene

A styrene-butadiene-styrene triblock copolymer (SBS) was grafted with an unsaturated polar monomer (monomer A) composed of maleic anhydride (MAH) and methoxy polyethylene (MPEG) via a ring-opening reaction after epoxidizing styrene-butadiene-styrene triblock copolymer (ESBS). The microscopic changes of SBS before and after grafting has been characterized with Fourier transform infrared spectrum (FT-IR), X-ray photoelectron spectroscopy (XPS) and gel permeation chromatography (GPC). The results revealed that the monomer A was successfully grafted on SBS backbone, and the maximum graft ratio (GR) was 20.32%. To verify the compatibility between SBS and asphalt, solubility parameters and surface free energy (SFE) of SBS, grafted SBS and asphalt were measured. It was found that the solubility parameter and SFE of grafted SBS were closer to asphalt compared with SBS. It also has been confirmed from storage stability that the temperature susceptibility of grafted SBS modified asphalt was reduced in compare with SBS modified asphalt binder. As consequence, the use of grafted copolymer can be considered a suitable alternative for modification of asphalt binder in pavement.

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